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"Yes. (if it's a Harrier) Mr ddc " Or a vc10 | |||
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"Yes. (if it's a Harrier) Mr ddc " If you can find one in an airworthy condition | |||
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"Yes. (if it's a Harrier) Mr ddc " I wouldn't like to see the state of the conveyor belt afterwards though. | |||
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"Yes, because the aeroplane's motive force is through its engines, not its wheels, so it will accelerate forwards as normal. The limiting factor will be if its tyres can withstand the added rotational speed caused by the moving runway... Simple really..... " What she said. | |||
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"No the plane takes off through momentum and engine thrust " "Thrust" *snigger* | |||
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"Yes it can. It's the speed of the air that creates a partial vacuum and so lift, not the speed of the plane itself. " But there wouldn't be an airspeed if the plane itself is essential motionless? | |||
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"Yes it can. It's the speed of the air that creates a partial vacuum and so lift, not the speed of the plane itself. But there wouldn't be an airspeed if the plane itself is essential motionless?" The plane isn't motionless though Yes it'll take off. | |||
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"No the plane takes off through momentum and engine thrust "Thrust" *snigger*" So childish. What kind of site do you think this is | |||
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"No the plane takes off through momentum and engine thrust "Thrust" *snigger* So childish. What kind of site do you think this is " *abashed* | |||
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"Fuck it, my head hurts. Who wants a shag instead " If you're having a shag, and you're thrusting your penis forward at a given speed, is it better if the vagina is stationary, or moving in the opposite direction though....? | |||
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"No, the plane for all intents is stationary. It has no more chance of lift than you would have of getting to the moon wearing roller skates whilst on a treadmill.. Even with the forward motion from the thrust of the engine, this is countered by the equal and negative motion of the band. It is the physical forward motion and the air passing across the wings surface that causes the plane to take lift off the ground. The wing is designed to direct the air flow with more passing under than over the wings surface causing a negative pressure above.. Lift could be achieved by passing enough air across the wings surface using a huge fan, like in a wind tunnel. However as that air would be turbulent stability could never be achieved in the open space. " That's what I said. I just said it in fewer words | |||
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"The aeroplane wouldn't be motionless - the engines will still drive it forward into the air, regardless of what the runway is doing underneath it. The moving runway will, however have two effects: 1. if the runway moved in the opposite direction to the 'plane, then it will drag more air undeneath the wings, which will actually increase lift, and so make it take off sooner (leaving out the question fo ground effect drag) 2. the combined forward motion of the 'plane and the opposite motion of the runway will cause the wheels to spin twice as fast - and so the tyres may fail and burst before take-off. Damn, I thought I'd left physics behind at school - there must still be some ratling around in my head somewhere... " Exactly what is said here. Since a jet plane is moved by THRUST it is irrelevant what the wheels are doing and what're those wheels are running on. The plane will still be THRUST forward in real terms to create lift and therefore take off. | |||
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"Yes. (if it's a Harrier) Mr ddc Or a vc10" What? | |||
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"Yes it can and will take off " This it's been proven on one of those myth buster type programmes | |||
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"No the plane takes off through momentum and engine thrust "Thrust" *snigger*" | |||
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"No, because any thrust and therefore forward motion would be equal to the conveyor moving in the opposite direction, thereby keeping the plane stationary. Airspeed, not groundspeed is required for lift and as the plane would be motionless all the thrust in the world isn't going to let it achieve lift." Think about it! Jet engine produces THRUST. This is acted upon the air, not the ground. It doesn't matter what the ground is doing, the aircraft will still go forwards in the air. | |||
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"This reminded me of the time I had to correct my maths teacher because she assumed there are 100 minutes in an hour when trying to calculate how long it will take a plane to reach its destination . I was 13 at the time..." Your maths teacher thought there were 100 minutes in an hour? | |||
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"This reminded me of the time I had to correct my maths teacher because she assumed there are 100 minutes in an hour when trying to calculate how long it will take a plane to reach its destination . I was 13 at the time... Your maths teacher thought there were 100 minutes in an hour? " She was always late for work. | |||
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"Would it make a difference if it was a jet or propellor plane? " I'd say less requirement on lift from wings as planes are smaller. Fact is runways are built for a reason I think | |||
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"Would it make a difference if it was a jet or propellor plane? " No. it would still take off. The ground has no bearing on the forward motion of an aircraft that is being driven within the air. | |||
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"Would it make a difference if it was a jet or propellor plane? " No | |||
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"No, because any thrust and therefore forward motion would be equal to the conveyor moving in the opposite direction, thereby keeping the plane stationary. Airspeed, not groundspeed is required for lift and as the plane would be motionless all the thrust in the world isn't going to let it achieve lift. Think about it! Jet engine produces THRUST. This is acted upon the air, not the ground. It doesn't matter what the ground is doing, the aircraft will still go forwards in the air. " But it needs momentum to get lift to start with | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did " I'm an aeroplane driver and I say the answer is yes. | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did I'm an aeroplane driver and I say the answer is yes. " Surely that's a pilot, being one you'd know that | |||
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"Why did the chewing gum cross the road,,,? " To fuck the chicken? | |||
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"Why did the chewing gum cross the road,,,? " Something about being stuck to a shoe? | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did " Back to uni for you! It will fly. | |||
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"Would it matter what colour the plane was? " Yup! Everyone knows that red ones go faster! | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did I'm an aeroplane driver and I say the answer is yes. Surely that's a pilot, being one you'd know that " Damn! | |||
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"Would it matter what colour the plane was? Yup! Everyone knows that red ones go faster! " White is a lighter colour than black so that's why planes are often white cos they is lighter than black ones. | |||
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"Why did the chewing gum cross the road,,,? Something about being stuck to a shoe?" Ok half a point... Full point if you'd said it was stuck on the chickens foot ,,,, | |||
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"Why did the chewing gum cross the road,,,? Something about being stuck to a shoe? Ok half a point... Full point if you'd said it was stuck on the chickens foot ,,,, " I got half a point! Whoop! *dances | |||
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"Why did the chewing gum cross the road,,,? Something about being stuck to a shoe? Ok half a point... Full point if you'd said it was stuck on the chickens foot ,,,, I got half a point! Whoop! *dances " Enjoy the moment ... | |||
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"Why did the chewing gum cross the road,,,? Something about being stuck to a shoe? Ok half a point... Full point if you'd said it was stuck on the chickens foot ,,,, I got half a point! Whoop! *dances Enjoy the moment ... " Thanks | |||
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"Would it make a difference if it was a jet or propellor plane? No" The plane is stationary, it's not gonna take off.. It's nothing to do with thrust, well not in this instance anyway... Consider a glider, it has no thrust and requires forward motion of being towed to obtain lift.. If it was possible to obtain flight from a conveyer belt, military aircraft carriers would be far smaller and the mod would not need to be investing a few quid on f35 aircraft and a new aircraft carrier plus all the re-qualification work to arm the new aircraft. | |||
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"Would it make a difference if it was a jet or propellor plane? No The plane is stationary, it's not gonna take off.. It's nothing to do with thrust, well not in this instance anyway... Consider a glider, it has no thrust and requires forward motion of being towed to obtain lift.. If it was possible to obtain flight from a conveyer belt, military aircraft carriers would be far smaller and the mod would not need to be investing a few quid on f35 aircraft and a new aircraft carrier plus all the re-qualification work to arm the new aircraft." Give that man a new towel | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did " I think you need to go back to uni then. You obviously sat at the back of the class. | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. " What sort of a plane is it?...because THAT kind of matters.. Some planes don't need speed to take off.... | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did I think you need to go back to uni then. You obviously sat at the back of the class. " Since I can't be arsed typing or arguing here... So read that and then tell me how a stationary object generates velocity? The amount of lift generated by an object depends on a number of factors, including the density of the air, the velocity between the object and the air, the viscosity and compressibility of the air, the surface area over which the air flows, the shape of the body, and the body's inclination to the flow, also called the angle of attack. In general, the dependence on body shape, inclination, air viscosity, and compressibility is very complex. One way to deal with complex dependencies is to characterize the dependence by a single variable. For lift, this variable is called the lift coefficient, designated "Cl". For given air conditions, shape, and inclination of the object, we have to determine a value for Cl to determine the lift. For some simple flow conditions and geometries, and low inclinations, aerodynamicists can now determine the value of Cl mathematically. But, in general, this parameter is determined experimentally using models in a wind tunnel. For thin airfoils, at small angles of attack, the lift coefficient is approximately two times pi (3.14159) times the angle of attack expressed in radians. Cl = 2 * pi * angle (in radians) The modern lift equation states that lift is equal to the lift coefficient (Cl) times the density of the air (r) times half of the square of the velocity (V) times the wing area (A). | |||
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"No, Bernoulli's principle requires airflow over the wing and as the wing itself is not moving forward there will be no lift. The air doesn't care what the engines or wheels are doing. If it isn't forced to travel further over the top of the wing than air passing beneath the wing there will be no lift " Some aren't listening... getting all caught up in the conveyor belt.. must be a rubber thing | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air." Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... | |||
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"The amount of lift generated by an object depends on a number of factors, including the density of the air, the velocity between the object and the air, the viscosity and compressibility of the air, the surface area over which the air flows, the shape of the body, and the body's inclination to the flow, also called the angle of attack. In general, the dependence on body shape, inclination, air viscosity, and compressibility is very complex. One way to deal with complex dependencies is to characterize the dependence by a single variable. For lift, this variable is called the lift coefficient, designated "Cl". For given air conditions, shape, and inclination of the object, we have to determine a value for Cl to determine the lift. For some simple flow conditions and geometries, and low inclinations, aerodynamicists can now determine the value of Cl mathematically. But, in general, this parameter is determined experimentally using models in a wind tunnel. For thin airfoils, at small angles of attack, the lift coefficient is approximately two times pi (3.14159) times the angle of attack expressed in radians. Cl = 2 * pi * angle (in radians) The modern lift equation states that lift is equal to the lift coefficient (Cl) times the density of the air (r) times half of the square of the velocity (V) times the wing area (A)." | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... " There was opposite arrows in that when I typed it | |||
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" Plane moving that way belt same speed ie stationary = no airflow or velocity " I'm not getting in this argument with you and the other poster. But you need to think about what you've just typed... Read it and re-read it again. | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... " How does the conveyor belt moving backwards stop the plane moving forward? | |||
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" Plane moving that way belt same speed ie stationary = no airflow or velocity I'm not getting in this argument with you and the other poster. But you need to think about what you've just typed... Read it and re-read it again." There was opposite arrows.. mainly because I read the question.. might I suggest you do the same | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward?" You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this | |||
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" How does the conveyor belt moving backwards stop the plane moving forward?" ^ sort of this. | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. " According to a scientist who's appeared on a podcast I listened to it could as the engine would eventually build up enough speed that it would essentially be weightless and a gust of wind could propel it into the air | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. According to a scientist who's appeared on a podcast I listened to it could as the engine would eventually build up enough speed that it would essentially be weightless and a gust of wind could propel it into the air" Probability over a large radius, massive inefficiency, instability and countering basic lift efficiency according to the laws of physics makes that reasonable but a pointless scientific statement | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. " Depends on if the pilot has a big cock. Everyone knows big cocks are better. | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this" Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. " so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic " Jesus Christ because on a treadmill your legs are powered but there's no power to a planes wheels ffs! | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic Jesus Christ because on a treadmill your legs are powered but there's no power to a planes wheels ffs!" Ha ha my god... so your legs aren't providing thrust just like the engine is... the power transfers down to the wheels moving the chassis forward... remember how the plane taxis to the runway? So... if on the belt and they both start at the same time/speed, engine thrust and belt speed are you saying this is completely different to the same equation as you running harder and the treadmill increasing speed simultaneously ? Somehow the plane has lift and airflow and you don't? Wow... | |||
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"Bunandbuck. Dont waste breath. You're banging your head on a brick wall. Some folk really cannot see logic. I'd also like to know how running on a treadmill has any similarity to a jet engine pushing air through it to generate THRUST. These others obviously believe the engines drive the plane's wheels in the same way your legs run on a treadmill. Maybe he should run on a treadmill holding a jet engine and let's see if it pushes him off it or in his theory it wouldn't have any effect at all " What colour is the sky in your world? | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. " . Depends on the wind speed and direction | |||
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" How does the conveyor belt moving backwards stop the plane moving forward? ^ sort of this. " Because they are in equilibrium momentum. Therefore the plane does not move forward | |||
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"Bunandbuck. Dont waste breath. You're banging your head on a brick wall. Some folk really cannot see logic. I'd also like to know how running on a treadmill has any similarity to a jet engine pushing air through it to generate THRUST. These others obviously believe the engines drive the plane's wheels in the same way your legs run on a treadmill. Maybe he should run on a treadmill holding a jet engine and let's see if it pushes him off it or in his theory it wouldn't have any effect at all " And just for clarity I said the thrust pulls the chassis which the wheels are attached to. There isn't a driveshaft in them. Just to be clear | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic Jesus Christ because on a treadmill your legs are powered but there's no power to a planes wheels ffs! Ha ha my god... so your legs aren't providing thrust just like the engine is... the power transfers down to the wheels moving the chassis forward... remember how the plane taxis to the runway? So... if on the belt and they both start at the same time/speed, engine thrust and belt speed are you saying this is completely different to the same equation as you running harder and the treadmill increasing speed simultaneously ? Somehow the plane has lift and airflow and you don't? Wow... " NOOOOOOOOOOOO!!!!!!, at no point is the engine powering the wheels!!!!!!, it is pushing air over the wing creating lower pressure above the wing than below thus generating lift | |||
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"I think the treadmill example proved useful to explain opposite and opposing forces. If they are equal then they cancel out " Thanks but your wasting your breath here because logical comparisons of opposite forces is a shite example against a jet engine! Which has an exact opposite force... as the question states but hey what the fuck do I know Lol mental | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita " Hoorah... thank you And nice tights | |||
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" Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita " Where does it say that there isn't any forward motion? | |||
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" Thanks but your wasting your breath here because logical comparisons of opposite forces is a shite example against a jet engine! Which has an exact opposite force... as the question states but hey what the fuck do I know Lol mental " '...your wasting' Like I say. Sat at the back of the class | |||
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" Thanks but your wasting your breath here because logical comparisons of opposite forces is a shite example against a jet engine! Which has an exact opposite force... as the question states but hey what the fuck do I know Lol mental '...your wasting' Like I say. Sat at the back of the class " You're as in you are.. I guess you were there too in English class | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights " There WILL be forward motion irrelevant of the conveyor speed. | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights There WILL be forward motion irrelevant of the conveyor speed. " Explain one thing... how will there be forward motion if the belt and plane move in opposite directions at the exact same time? Explain that and I will agree with you | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights There WILL be forward motion irrelevant of the conveyor speed. " How? The conveyor is cancelling it out according to the question posed. Thrust (force if you wish) and forward motion are not the same thing. Oh God., I wish I'd not got involved... going to bed I think Nita | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights There WILL be forward motion irrelevant of the conveyor speed. How? The conveyor is cancelling it out according to the question posed. Thrust (force if you wish) and forward motion are not the same thing. Oh God., I wish I'd not got involved... going to bed I think Nita " Nina can I come? | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic " And I'm in | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic And I'm in " Very kind of you This is pissing me off tho lol basic fckin physics | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights There WILL be forward motion irrelevant of the conveyor speed. How? The conveyor is cancelling it out according to the question posed. Thrust (force if you wish) and forward motion are not the same thing. Oh God., I wish I'd not got involved... going to bed I think Nita Nina can I come? " Think I would be well asleep by the time you got here... and not much space in our bed for three. I love a Scots accent ... Nita | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic And I'm in Very kind of you This is pissing me off tho lol basic fckin physics " I can tell, but you're doing well | |||
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"Been reading this with interest... Sorry Bun & Buck, much as I love you... you (and others) are wrong. I may not be an engineer but I did do A level Physics. Thrust is irrelevant, there is no forward motion so the plan will not take off. I won't repeat the explanations already given. Nita Hoorah... thank you And nice tights There WILL be forward motion irrelevant of the conveyor speed. How? The conveyor is cancelling it out according to the question posed. Thrust (force if you wish) and forward motion are not the same thing. Oh God., I wish I'd not got involved... going to bed I think Nita Nina can I come? Think I would be well asleep by the time you got here... and not much space in our bed for three. I love a Scots accent ... Nita" Well you never know when I might be in town... Buy you and the hubby a cocktail or two to celebrate synergy in basic physics | |||
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" I still want to know how a VC10 is similar in flight characteristics to a Harrier.." That did cross my mind. VC10's are form the 50s? | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off " A 'slapstick cartoon' scenario comes to mind here....but I think I am with you on this one....The Spike Milligan school of physics | |||
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"The plane's wings need to be going through the wind at a considerable speed to provide lift. If the plane isn't moving due to the conveyor belt, then the wings won't have the ability to provide the aircraft with enough lift to take off. " Bingo... another one.. forward motion=velocity means airflow and lift. #mic drop | |||
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"The plane's wings need to be going through the wind at a considerable speed to provide lift. If the plane isn't moving due to the conveyor belt, then the wings won't have the ability to provide the aircraft with enough lift to take off. Bingo... another one.. forward motion=velocity means airflow and lift. #mic drop " Skadoosh! | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off " I've tried that without the treadmill. It still doesn't work | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic And I'm in Very kind of you This is pissing me off tho lol basic fckin physics " You're right it is basic physics...thrust from the propeller accelerates the plane through the AIR regardless of the wheels relationship to the GROUND!! | |||
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"Fucked if I know. I prefer biology. " Now there's a better offer | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic And I'm in Very kind of you This is pissing me off tho lol basic fckin physics You're right it is basic physics...thrust from the propeller accelerates the plane through the AIR regardless of the wheels relationship to the GROUND!!" Now it's a propeller plane and not a jet... and missing completely that the opposite force trying to drag it backwards is being cancelled out by either this fictitious jet or propeller thrust.. still no forward motion Sigh | |||
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"The plane wont be stationary. The conveyor belt has no way of holding it stationary. Its not a car driving by its wheels. Its a plane thrusting against air. Arghhhhhhh read the question !! Plane moving that way belt same speed ie stationary = no airflow or velocity Fuck me.... How does the conveyor belt moving backwards stop the plane moving forward? You ever ran on a treadmill?? Feel the wind rushin through your hair so you?? Can't believe I'm even getting into this Thats the difference. I move forward by my feet pushing against the floor. A treadmill can keep me stationary by travelling at yhe exact opposite speed. A plane moves forward by pushing against the air. The conveyor doesnt affect the air. so the wheels aren't touching the ground as the plane moves forward and the belt in opposite direction, at the exact same speed just like your feet and treadmill? Tell me the difference ? Now I'm intrigued in your logic And I'm in Very kind of you This is pissing me off tho lol basic fckin physics You're right it is basic physics...thrust from the propeller accelerates the plane through the AIR regardless of the wheels relationship to the GROUND!! Now it's a propeller plane and not a jet... and missing completely that the opposite force trying to drag it backwards is being cancelled out by either this fictitious jet or propeller thrust.. still no forward motion Sigh " Whether it's a prop, jet, push prop or turbo prop it's the relationship of thrust to air not thrust to ground which achieves lift! | |||
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"But what if the conveyor belt is at the north pole so it is also rotating?" Then it would go downwards and corkscrew its way through to Antartica | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off A 'slapstick cartoon' scenario comes to mind here....but I think I am with you on this one....The Spike Milligan school of physics " | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off I've tried that without the treadmill. It still doesn't work " You'll have to show me | |||
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"Why do people ignore the answer when it's posted...... https://youtu.be/YORCk1BN7QY " Because it's more intersting to use our brains? | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off I've tried that without the treadmill. It still doesn't work You'll have to show me" It's not an attractive look. Naked does equal streamlined though! | |||
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"Why do people ignore the answer when it's posted...... https://youtu.be/YORCk1BN7QY Because it's more intersting to use our brains?" That's probably the best answer yet | |||
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"Myth busters proved this won't work. " They proved that it does work. | |||
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"How about put someone on a treadmill and get them to run really fast. The treadmill will go as fast as the person runs. Then get them to put their arms out sideways and see if they can take off I've tried that without the treadmill. It still doesn't work You'll have to show me" Tried this, this morning nearly fell off the bloody thing. | |||
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"Ok i did a level physics too. Walking on a treadmill is one thing everybody understands that and thats why it feels a weird question. When we walk we go forward because of the force exerted on the ground my our feet. So a reverse moving treadmill keeps us staitonary. The planes wheels free spin on its axle and cannot exert any reverse force on the plane. Therefore the jet thrust only has to accelerate the mass of the plane. The plane moves forward as it would on a runway. The moving treadmill is an irrelevant factor (apart from any small fraction in the axle). Nobody is suggesting a stationary plane would take off, just that the plane moves forward as normal and consequently eventually takes off." So why don't we just do away with aeroplane wheels, since the damn things are so obviously redundant! Let the fuckers levitate! | |||
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"Of course it takes off; the speed of the conveyor belt has no influence on the speed of the aircraft." Actually, that's a good point! The thrust comes from the turbines, not the wheels. If the wheels on the aircraft can handle the speed of the aircraft's acceleration and the opposing speed of the conveyor belt, then it should take off! Damn, how did I miss that | |||
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"Following from the long maths probability question, how about this: “A plane is standing on a runway that can move (some sort of band conveyer belt). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in the opposite direction). Can the plane take off?” Answers on a postcard etc. " Yes, they did this experiment on mythbusters. Basically because the engine isn't driving the wheels it makes no difference if the ground is moving in an equal and opposite direction | |||
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"Ok i did a level physics too. Walking on a treadmill is one thing everybody understands that and thats why it feels a weird question. When we walk we go forward because of the force exerted on the ground my our feet. So a reverse moving treadmill keeps us staitonary. The planes wheels free spin on its axle and cannot exert any reverse force on the plane. Therefore the jet thrust only has to accelerate the mass of the plane. The plane moves forward as it would on a runway. The moving treadmill is an irrelevant factor (apart from any small fraction in the axle). Nobody is suggesting a stationary plane would take off, just that the plane moves forward as normal and consequently eventually takes off. So why don't we just do away with aeroplane wheels, since the damn things are so obviously redundant! Let the fuckers levitate! " They are redundant in terms of moving the plane forward. They only stop the rest of the plane from dragging on the ground. | |||
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"Yes. (if it's a Harrier) Mr ddc If you can find one in an airworthy condition " Yanks are still flying them, in fact they bought all ours in the cheap for spares | |||
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"Ok i did a level physics too. Walking on a treadmill is one thing everybody understands that and thats why it feels a weird question. When we walk we go forward because of the force exerted on the ground my our feet. So a reverse moving treadmill keeps us staitonary. The planes wheels free spin on its axle and cannot exert any reverse force on the plane. Therefore the jet thrust only has to accelerate the mass of the plane. The plane moves forward as it would on a runway. The moving treadmill is an irrelevant factor (apart from any small fraction in the axle). Nobody is suggesting a stationary plane would take off, just that the plane moves forward as normal and consequently eventually takes off." Yes! | |||
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"So why don't we just do away with aeroplane wheels, since the damn things are so obviously redundant! Let the fuckers levitate! " Some already do - taking off on water/ice etc. | |||
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"Ok i did a level physics too. Walking on a treadmill is one thing everybody understands that and thats why it feels a weird question. When we walk we go forward because of the force exerted on the ground my our feet. So a reverse moving treadmill keeps us staitonary. The planes wheels free spin on its axle and cannot exert any reverse force on the plane. Therefore the jet thrust only has to accelerate the mass of the plane. The plane moves forward as it would on a runway. The moving treadmill is an irrelevant factor (apart from any small fraction in the axle). Nobody is suggesting a stationary plane would take off, just that the plane moves forward as normal and consequently eventually takes off. So why don't we just do away with aeroplane wheels, since the damn things are so obviously redundant! Let the fuckers levitate! They are redundant in terms of moving the plane forward. They only stop the rest of the plane from dragging on the ground." | |||
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"So why don't we just do away with aeroplane wheels, since the damn things are so obviously redundant! Let the fuckers levitate! Some already do - taking off on water/ice etc." Enlighten me as to which planes can levitate?! (as in "float") Aside from vtol planes which obviously only "levitate" with assistance from the engines | |||
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" The answers no, I'm a physicist If you want to know why go to uni like I did I'm an aeroplane driver and I say the answer is yes. Surely that's a pilot, being one you'd know that " Well I am a d*unk, so I spend a lot of time talking to bloke down the pub... The answer is yes as the conveyor belt would not have any practical effect except to spin the wheels faster as stated above... Now if you could create a vacuum of equal volume to the thrust of each engine.. that would be silly | |||
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